Telegraph transmitter



Jan. 24, 1928. 1,657,095

A. E. SENOBE TELEGRAPH TRANSMITTER Filed Dec. 31, 1??

J7. E Sen0$ Patented J an. 24, i 1928.

UNITED "STATES AXEL EMANUEL SENOBE, F NEG-AUNEE, MICHIGAN.

PATENT OFFICE.

TELEGRAPH TRANSMITTER.

Application filed December 31 1926. Serial No. 158,272.

formedfrom the usual vibrating reed type of instrument to a key. A further object of the invention is the provision of? a construction of this character which may be very readily and cheaply constructed, which will be durable and efficient in service and a general improvement in the art; a

"These and other objects I attain by the construction shown in the accompanying drawings, wherein for the purpose of illustration is "shown a preferred embodiment of my invention and wherein:-

Figure 1 is a plan view of a key constructed in accordance with my invention;

Figure 2 is a side elevation thereof;

Figure 8 is a section on the line 3-3 of Figure 2; j

Figure 4 is a section on the line of 3 fieferring now more particularly to the drawings, the numeral 10'indicates a suitable base, at present indicated as constructed of conducting material. Arising from this base and electrically connected therewith is a support 11, to the upper end of which is secured a spring 12, the opposite end of which is secured through a block '13 to an operating lover or key 14. Between the block '13 and key lever 14 is secured the end of a 4 spring 15, the "outer end of which has secured thereto a bar 16 havingarranged thereona counterweight 17. The bar 16 bears-a contact spring 18 adapted to coact with an adjustable screw contact 19 carried by and in- 5 Sula-ted from the base.

It will be noted that the spring 15 attached at a point spaced from the inner end of the lever 14 and lies closely against this lever. This end of the lever, therefore,

acts as a fulcrum about which the spring tensions when swung in one direction under the influence of the weight 17. This shortdouble speed telegraph ens the rebound action of the spring or action which carries the contact s ring 18 away from the contact screw 19. djacent the free end of thebar '16, a support 20 is d1sposed,this support being electrically connected with the base and having rotatably v mounted thereon a latch 21 which, in one position thereof, engagesthe bar 16 tohold the same against movement transversely of the base and accordingly servestc revent engagement of the contact 1'8 with t e contact 19. An adjustable screw 22 opposes movement of the spring 15 in a direction permitting separation of the contacts 18 and 19. Upon the base are arranged binding posts 23 and 24, the binding post 23 being electrically connected with the base and the binding post 24 being electrically connected with the contact screw 19 by a contactstrip '25 connecting the binding post with a support 26 upon which the Contact screw l9 1s mounted.

Arranged upon opposite sides of the key lever are standards 27 and 28 insulated from the base 10 and each having at their upper ends a contact screw 29 for 'coaction with the contact 30 upon the adjacent face of the key lever. The standard 27 is electrically connected with the binding post 24 by a bus 31 and electrically connected with the standard 28 is a switch 32 which may be shifted to a position where it electrically connects the standards 27 and 28. Electrically connected with the base is a second "switch 33 which maybe employed to connect the binding post 24 to the base and thus shorten the instrument.

The operation of the device is as follows:

When the operator desires to employ the device as a semi-automatic key, the latch 21 is disengaged and the switch 32 moved to the open position. In this position, when the key c0'ntact30 engages with the screw 29 of the standard 27, dashes may be formed, while when the key is moved to engage the contact 30 at the opposite side with the screw 29 of the standard 28, no circuitlis completed at this point, but the vibration of the spring or reed 15 will cause the contacts 18 and 119 to intermittently engage and disenga forming the dot signal. When it is de foo sired to employ the device as a simple key,

the latch 21 may be employed tolock the bar 16 against movement and the switch 32 left open. At this time, the horizontally swinging lever will complete the circuit through the binding screw 29 of the support 27. fr desired that a double speed key be produced, the switclr32 is closed, while the bar 16 is locked against movement and by this operation, both the adjustment screws 29 are connected in the circuit, sothat operation of the key lever 14 to bringthe con-w diet into engagemeiit with either thereof will cause-completion of the circuit in the formation of a signal element. 7

Itwill be obvious that a-single instrument actually includes three different types of telegraph keys, enabling an operator to shift fromoneform of sendingvto another, so that his hand may be rested. It will also be obvious that because of the simplicity of the construction, the device may be very cheaply and at the same time durahly constructed. Particular attention is directed to the fact thatwith the bar 16 locked, the springl5 acts to assist in tensioning the key lever 14 andin the maintenancethereof in the proper central position. ,1

, S 'nce the construction hereinbefore set forth is capable of a certain range of change and modification without materially departing from the spirit of the invention, I do not limit myself to such specific structure except as hereinafter claimed.

I claim 1. In a telegraph instrument, a key lever mounted to swing horizontally, a spring secured .at its end only to the key lever the connection being at a point intermediate the ends of the keylever, the spring extending along one face of the key lever, a bar carried by the outer end of the spring, a spring contact carried by the bar, a second con tact with which the spring contact is adapted to engage upon vibration oi. the bar-when the key lever is shifted a predetermined distance in one direction and adjustable means limiting the shifting of the key lever in saiddirection.

2. In a telegraph instrument, a key lever mounted to swing horizontally, a spring secured at its end only to the key lever the connection being ata pointintermediate the ends of the keyrlever, the spring extending along one face of the key lever, a bar carried by the outervcnd of the spring, a spring contact carried by the bar, a second contact with which the spring contact is adapted to engage upon vibration of the bar whenthe key lever is shifted a prede- Tter'mined distance in one direction, an adjustable member limiting the shifting of the key lever in said direction and. insulated from the secondpontact, asecond adjustablemember limiting movement of the key "lever inthe opposite direction and electrically connected with the second contact, and a switch for electrically connecting the first named adjustable member with the second namedadjustable member. 1

3. Ina telegraph key, a base, a standard arising from the base, a spring secured at one end to the standard, a key lever secured to the opposite end of the spring, a secdnd spring secured at its end only to the key lever the connection being at a point intei mediate the ends or the key lever, said second spring extending along one face of the keylever,a bar carried by the free end of a the second spring, a spring contact car ried thereby and a second contact with which the spring contact engages upon v1- bration of the lever whenmoved a predetermined distance in one direction.

4. In a telegraph key, a base, a standard arising from the base, a spring secured at one end to-the standard, a key lever secured to the opposite end of thesprmg, a

second spring secured at its end only to the key lever the connection being at a point intermediate the ends of the key lever,said second spring extending along one face of the key lever,a bar carried by the free end of the second spring, a spring contact carried thereby, a second contact with which the spring contact engages upon vibration of the leverwhen movedva predetermined distance in, one direction, a third contact element limiting movement of the key lever in said direction and normally insulated from the second contact, a fourth contact limiting movement of the key lever in the opposite direction and electrically connected with the second contact and a switch for electrically connecting the third and fourth contact elements. v i 5. In a telegraph key, a base, a standard arising from the base, a spring secured at one end to the standard, a keylever secured to the opposite end of the spring, asecond spring secured at its end only to the key lever theconnnection being at a point intermediatethe ends of the key lever,said sec- 10nd spring extending along one face of the key lever, a bar carried by the free end of thesecond spring, a, spring contact carried thereby, a second contact with which the spring contact engages upon vibration from the second contact, a fourth contact a l1m1t1ng movement of the key lever in the opposite direction and electrically connected with the second contact, a switch for electrically connecting the, third and fourth ing engagement of the first and second contacts.

contact elements and means for latching the bar against movement in aposition prevent- 6. In combination with a telegraph instrument including a key lever and a vibratory reed element carried by the key lever for the formation of dots means for render- 5 ing said vibratory reed element inoperative,

a pair of adjustable contact members limiting movement of the key lever in opposite directions one of which is connected in the circuit of the instrument and a switch for connecting the second contact in the circuit 1 of the instrument.

In testimony whereof I hereunto aifix my signature.

AXEL EMANUEL SENOBE. I 

